Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phung thi he snippets" » "huong thi he snippets", "phung ho he snippets", "phung thi hue snippets", "phung thi hoe snippets", "phung thi ha snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("phung thi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phung thi he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phung thi he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phung thi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.